have you dropped the pan? have you replaced the mlps? it sounds like the shaft that goes from the manual lever to the valvebody is broken. what happens when you drive it? what happens when its in park?

 

Haven't dropped the pan, had just replaced the mlps the same night it started. Just going down the road it runs out fine, but no matter if its in park, reverse, or neutral it wants to go forward. I've read its most likely the reverse clutch welded to the drive or something similar, can't recall atm. An at that point it all has to come apart and a rebuild is needed. I wish a C6 from say a 460 would bolt right behind it, or i'd of just done that.